Double-pointed staple.



No. 780,019. PATENTED JAN 17, 1905., 0. ARBNDT.

DOUBLE POINTED STAPLE. APPLIOATIOH FILED APR.16. 1904-.

I gwue/vvlio c I @51 mkowm u m Ilnnnrhn STATES Patented. January 17, 1905.,

OTTO ARENDT, OF NEWARK, NEW JERSEY.

DOUBLE-POINTED STAPLE.

SPECIFICATION forming part of Letters Patent No. 780,019, dated January 17, 1905.

llpnlication filed April 16, 1904. Serial No. 203,399-

To (LZZ whom, it ITI/(LZ/ concern:

Be it known that I, OTTO ARENDT, a citizen of the United States, and a resident of Newark, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Double-Pointed Staples, of which the following is a specification.

This invention relates to fastening devices for use in uniting the parts composingbuttertubs, boxes, cases, and other articles, and generally for use by carpenters and builders; and the leading characteristics of my improve ments may be briefly described, as follows:

My said invention consists of a doublepointed staple produced bystamping out from strap metal, said staple being provided with a central longitudinal stiffening-rib, the points being formed by turning over the opposite ends at right angles to the staple-body, the material flanking the rib being doubled over a tapered hollow space in the formation of the points and the material at the sides of said points having been sheared to render their sidewise configuration of elongated V shape. The opposite ends of the staple-body above the points where the roots of thelatter join the body portion are slightly raised to form projections adapted to receive a central hammer-blow in driving said points into the wood, and the roots of thepoints are provided with shoulders bearing against the under surface of the body portion to carry the impact of the hammer-blows and permit the points to be accurately and unyieldingly driven into the wood.

In the drawings accompanying this application, Figure 1 is a view of a strip of strap metal prior to the formation of staples therefrom. Fig. 2 is a plan view of a strip cut from said strap prior to turning over the pointed ends thereof. Fig. 3 is a side elevation of a completed staple, and Fig. 4 is a sectional view taken on the line mm of Fig. 3.

In said figures the letter A indicates the body portion of a staple composed of strap metal having a central longitudinal rib a. B B indicate the pointed ends thereof, sheared at opposite sides to provide the outwardlytapering formation indicated. As seen in Fig. 4, said pointed ends when turned over comprise the double walls 6 b, separated from each other by the outwardly-tapering intervening space 6. It will be noted that the staple ends are turned at approximately right angles to the body portions at a point, as 7), anterior to the inward extremity 7) of the sheared side walls I) 7), the material existing intermediate the points V 7) furnishing a shoulder or bearing for said body portion. It will further be noted that the opposite ends of the body portion A, coniiprising the portions thereof resting upon the shoulders aforesaid, are slightly raised above the plane of said body portion, whereby the rib ('0 stands up free and clear in position to receive the hammerblows designed to drive the points into the wood. This latter function is important, because commonly with devices of this character unless the hammer is very accurately directed over the central axis of the staple point when the striking-surface is in the same plane as the body of the staple it is almost impossible to accurately drive the point into the wood.

The purpose of making the pointed ends hollow and oi the particular configuration in dicated renders them rigid and stiff, avoiding the liability of bending when being driven into the wood, also having tlleadditional function of permitting the wood to enter said hollow space, thus giving the points a firm hold in the wood.

Having now described my invention, I de clare that what I claim is A double-pointed staple composed of astrip of metal having a central longitudinal stiflening-rib, the ends of said strip being tapered, and folded lengthwise with a V-shaped intervening space, and said ends being bent from a point anterior to their tapered portion at right angles to the body portion, to form staple-points, the side material existing between the bent and the tapered portions forming a shoulder or a bearing for the body portion, and said body portion so supported, being raised above the normal plane of the .body portion, whereby the rib portion over each staple projects upwardly as an impactsurface to receive hammer-blows in driving the staple, as into wood.

OTTO ARENDT.

Witnesses:

F. Vv BARKIGR, R. A. ETHnRsoN. 

